"Don't believe the placard would be incorrect though as many that we've looked at had different payload values for the same models (equipped different). "
I completely agree. My big question is at what stage was mine weighed? My sticker says 18,075#.
DRV is a Company that will take away or add about any option you like so there is NO WAY to tell what a RV will weigh. Example we did not add the fiberglass roof that we THOUGHT we wanted we were advised against it as they had too many problems and a short warranty VS a long rubber warranty. We have 3 AC units, two 6V battery, Gen prep and gen later added at dealer, Quartz tops, 1,000W inverter, larger TV, Dish satellite on roof, large storage tray in basement, TrailAire with TriGlide kingpin, Elite wood package, washer and dryer, two power awnings, added cabinetry, the list goes on that add weight.